Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf1371b506e46a7…

MALICIOUS

PDF

34.5 KB Created: 2020-11-09 03:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d03a8f44f8ac974ef89bf1033142cbc2 SHA-1: 68c8d85ade512744c5f4ee2aaa7f1d5cdc1e6d28 SHA-256: 2bf1371b506e46a792dd4990791d4a3ca23abab51bae5b2273e7bb232e3e0515
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?keyword=engranaje+en+ingles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407087/normal_5f9785cb30b5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/sofelumazoxapipajada.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/34068470375.pdfIn PDF document text
    • https://rerowabesafe.files.wordpress.com/2020/11/magnetisme_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4141288-5879-4111-94a6-53e0355189ee/fumod.pdfIn PDF document text
    • https://jumidez.files.wordpress.com/2020/11/vanelo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/karuwepogexipok.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/fallon_ambulance_crew_scheduler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6394eae-5235-4a0f-9dd5-6a3dde56ea37/90828758297.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/56747698914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6e7dac-a32e-4d31-b202-7a6a6f0982a5/74208133378.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D0 4888 bytes
SHA-256: 0974c742637eb3cfb0d75351a3cf6bd7d76b230af09687461b34f4c8d82ce695
font_01_sfnt_off00005986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5986 10760 bytes
SHA-256: 0cc650c7878aeb7dbd8345e7290ffdc3f0e2c4663a679f9b3aeaf2ff1bb0e53d

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